Global Patent Index - EP 1791620 A4

EP 1791620 A4 20100707 - AUTOMOTIVE EXHAUST COMPONENT AND METHOD OF MANUFACTURE

Title (en)

AUTOMOTIVE EXHAUST COMPONENT AND METHOD OF MANUFACTURE

Title (de)

AUTOAUSPUFFBAUTEIL UND HERSTELLUNGSVERFAHREN DAFÜR

Title (fr)

COMPOSANT DE SYSTEME D ECHAPPEMENT AUTOMOBILE ET PROCEDE DE FABRICATION

Publication

EP 1791620 A4 20100707 (EN)

Application

EP 04755589 A 20040618

Priority

  • US 2004019502 W 20040618
  • US 86792504 A 20040615

Abstract (en)

[origin: US2004265191A1] A catalytic converter for an internal combustion engine exhaust system comprises a single-piece, seamless metal housing having tubulated gas inlet and outlet ports and a tubulated intermediate section with a plurality of cascaded catalytic element therein. The intermediate section is connected to the inlet port by an inlet transition section and to the outlet port by an outlet transition section. The inlet and outlet ports and the inlet and outlet transition sections are formed by swaging the ends of a seamless tube used to form the housing. Exhaust gas produced by operation of the engine passes into the converter and through the catalytic element. Noxious substances in the exhaust, including CO, NOx, and incompletely combusted hydrocarbons are converted to more benign substances through the action of the catalytic element, which is preferably a frangible ceramic honeycomb structure having a plurality of internal passages coated with a catalytically active substance. A swaging process is used to form tubulated ends on the converter. The tabulated ends minimize production of turbulence in the gas flow and allow the converter to be connected to the rest of the exhaust system by clamped, welded, or flanged joints. The one-piece, seamless construction of the converter is economical to produce and eliminates welding of housing components that tend to fail when subjected to corrosive exhaust gasses over a prolonged period of time.

IPC 8 full level

B01D 50/00 (2006.01); B01D 53/94 (2006.01); B21D 51/16 (2006.01); F01N 3/28 (2006.01)

CPC (source: EP US)

B01D 53/9454 (2013.01 - EP US); F01N 3/2853 (2013.01 - EP US); F01N 3/2857 (2013.01 - EP US); F01N 13/0097 (2014.06 - EP US); F01N 13/185 (2013.01 - EP US); F01N 2310/08 (2013.01 - EP US); F01N 2350/02 (2013.01 - EP US); F01N 2450/20 (2013.01 - EP US); Y02T 10/12 (2013.01 - EP US); Y10T 29/49345 (2015.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

US 2004265191 A1 20041230; US 7323145 B2 20080129; CA 2570842 A1 20060105; CN 101547731 A 20090930; CN 101547731 B 20120704; EP 1791620 A2 20070606; EP 1791620 A4 20100707; JP 2008511776 A 20080417; JP 4482585 B2 20100616; WO 2006001807 A2 20060105; WO 2006001807 A3 20090402

DOCDB simple family (application)

US 86792504 A 20040615; CA 2570842 A 20040618; CN 200480043805 A 20040618; EP 04755589 A 20040618; JP 2007516452 A 20040618; US 2004019502 W 20040618